When comparing Fitbit Surge vs Fitbit Flex 2, the Slant community recommends Fitbit Surge for most people. In the question“What are the best fitness trackers?”Fitbit Surge is ranked 8th while Fitbit Flex 2 is ranked 12th. The most important reason people chose Fitbit Surge is:

The Fitbit Surge fitness tracker has automatic, continuous, wrist based heart rate tracking. Heart rate data is stored at one second intervals during exercise, and at five second intervals during non-exercise activities.

Pros

Pro

The Fitbit Surge fitness tracker has automatic, continuous, wrist based heart rate tracking. Heart rate data is stored at one second intervals during exercise, and at five second intervals during non-exercise activities.

Pro

LCD screen that can display multiple stats without the need of using the app

Similar fitness trackers depend on Bluetooth in order to relay info to a smartphone. Fitbit Surge can display information locally on the display which is far more convenient.

Pro

Lets users log meals by voice

Users can tell Surge what was eaten, and a database will be used to match the entry with nutritional information.

Pro

Does not need to be recharged frequently

The battery lasts 5-7 days which is one of the longer lasting options for rechargeable fitness trackers.

Pro

Easy to operate compared to display-less options

While Surge easily syncs with iOS, Android, and Windows phones, it does not depend on them for functionality. The touch screen and physical buttons are a huge step up from display-less models.

Pro

Great option for swimmers

The fitness tracker is completely waterproof and keeps track of your laps, pace, and total duration of your swim.

Pro

Sleek design fits a variety of occasions

The Flex 2 is a thin band all the way around that has a modern and sleek design. Since it isn't super sporty in appearance, you can confidently wear it for a lot of different occasions without it looking out of place.

Pro

The app and web platform do an excellent job of keeping you motivated

The Fitbit app lets you set goals and milestones which reward you with badges and trophies when reached.You can also challenge friends and family, competing against them for top spot on the leader board.

Pro

Replaceable wristband with lots of options available

The fitness tracker itself is a separate part from the wristband that can be taken out and put in a different band. Therefore, not only are there 10 wristband colors to choose from on the official store, a different color of band can be worn every day with the same tracker. There are even custom bands available from third-party vendors.

Cons

Con

Might cause skin irritation for some

A number of people are reporting the Surge causes skin irritation. According to the company it's a very small percentage of customers.

Con

Screen prone to inadvertent touches

It's really easy to accidentally brush up against the fitness tracker's watch and end up on screens that the user wasn't intending to navigate to. This forces you to swipe back to the correct screen.

Con

Fairly big investment

While it's one of the most advanced trackers that Fitbit offers, it comes with a hefty price tag.

Con

Underwhelming battery life

The fitness tracker's battery lasts about 3-4 days on average.

Con

Can't be paired with external HR monitors

The Fitbit Flex 2 fitness tracker has no built in heart rate monitor and lacks the ability to pair with external HR monitors.